Timeline for Either quadratic or interaction term is significant in isolation, but neither are together
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 17, 2012 at 17:03 | comment | added | Peter Flom | Ooops. Yes, David, not Donald. Sorry. | |
| Aug 17, 2012 at 16:51 | comment | added | Michael R. Chernick | @PeterFlom Maybe you mean Sir David Cox?? | |
| Aug 17, 2012 at 8:57 | comment | added | Peter Flom | Hi @TalBashan A famous statistician, Donald Cox, once said that "there are no routine statistical questions, only questionable statistical routines" | |
| Aug 17, 2012 at 7:54 | comment | added | Tal Bashan | Thanks Peter & @Greg. I guess that at this stage of my studies I'm looking for absolute answers to questions that need at least some qualitative reasoning. Since the addition of either the quadratic term or the interaction term 'fixed' the residuals vs predictor plot, I was not sure which one should be included. What did surprise me is that the inclusion of a quadratic term rendered the interaction term non-significant. I would have thought that if there is an interaction, it would be significant regardless of whether a quadratic term was included or not. | |
| Aug 17, 2012 at 6:53 | history | answered | Peter Flom | CC BY-SA 3.0 |